Chemistry questions
29404 published questions with worked solutions.
- C_2H_5- CH_3 | CH -C_3H_7 (i) Among the following four structures I to IV. CH_3- O | C - CH_3 | CH -C_2H_5 (ii), H- H | H | C^...
- How many unit cells are present in a cubeshaped ideal crystal of NaCl of mass 1.00 g ? [Atomic masses: Na = 23, Cl = 35.5 ]Not in JEE Main or NEET syllabus
- Which of the following could act as apropellant for rockets?Not in JEE Main or NEET syllabus
- If liquids A and B form an ideal solution
- In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking k_f for water as 1.85 , the freezing...
- For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25^ . The...
- Standard reduction electrode potentials of three metals A,B & C are respectively +0.5 V, −3.0 V & −1.2 V. The reducing powers of...
- When during electrolysis of a solution of AgNO_3 9650 coulombs of charge pass through the electroplating bath, the mass of silver...
- For the redox reaction Zn(s) + Cu^ 2+ (0.1M) Zn^ 2+ (1M) + Cu(s) taking place in a cell, E^0_ cell is 1.10 volt. E° for the cell...
- In respect of the equation k = Ae^ -E_a/RT in chemical kinetics, which one of the following statements is correct?
- The rate law for a reaction between the substances A and B is given by Rate = k[A]^n[B]^m On doubling the concentration of A and...
- For the reaction system: 2NO(g) + O_2(g) 2NO_2(g) volume is suddenly reduce to half its value by increasing the pressure on it....
- Which one of the following characteristics is not correct for physical adsorption?Not in JEE Main or NEET syllabus
- What may be expected to happen when phosphine gas is mixed with chlorine gas?
- Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
- The radius of La^ 3+ (Atomic number of La = 57 ) is 1.06Å. Which one of the following given values will be closest to the radius...
- The number of d-electrons retained in Fe^ 2+ (At.no.of Fe = 26 ) ion is
- A reduction in atomic size with increase in atomic number is a characteristic of element of
- The atomic numbers of vanadium (V), Chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23 , 24,25 and 26 . Which one of...
- Ammonia forms the complex ion [Cu(NH_3)_4]^ 2+ with copper ions in alkaline solutions but not in acidic solutions. What is the...